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MT-50-MIL Electric Valve Actuator

from Eltorque

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The NAG Marine MT50-SS-440-A is an electric valve actuator based on permanent magnet technology. These Navy-type valve actuators feature 440V AC input power, stainless steel housings, and 4-20ma analog interface with local/remote control indication. The NAG Marine MT50-SS-440-A is 100% software configurable with no mechanical adjustment required.


The NAG Marine MT50-SS-440-A is an ideal solution for small to medium sized butterfly and ball valve control requirements with an operating torque range of 7-37 foot-pounds (50Nm max).


NAG Marine MT-MIL Series electric valve actuators are designed to be maintenance free, and feature completely enclosed, permanently lubricated transmissions to ensure extended reliable service in the harshest operating conditions.


Built to DOD-V-24657 Standards.


About MT-50-MIL



  • Precise multi-turn control for
    gate and globe valves
  • 50 Nm max torque
  • Stainless steel housing
  • Easy installation/retrofit
  • User-configurable torque, closing time, & position
  • Permanently lubricated
  • Low power consumption
  • Manual override


  • + Technical Specifications

    Torque 7-37 ft/lbs (50 Nm max.)
    Valve Stem Speed 7-17 RPM
    Valve Applications 2 & 3 inch multi-turn valves (typical)
    Closing Time 2 inch: 20 seconds; 3 inch: 25 seconds
    Dimensions (H x W x D) 16 x 4.5 x 9 in (406.4 x 114.3 x 228.6 mm)
    Weight 33 lbs. (14.9 Kg)
    Housing Stainless steel
    Operating Temp -13° to 131°F (-25° to 55°C)
    Over Temp Protection Motor current turned off
    Under Temp Protection Stator coils maintain internal temperature
    Supply Voltage 110-240V AC (single phase) 50-60Hz or
    440-460V AC (3 phase) 50-60hz
    Power Consumption Max: 120W/280 VA, Standby: 11W
    Power MIL-DTEL-5015 series
    75-474214-02P, 4-pin connector
    Actuator housing includes threaded mounting holes
    Optimized for fieldbus installation (refer to intstallation manual for specific requirements)
    Control Interface
    Analog Version Close signal: 20Ma
    Open signal: 4Ma
    Local remote control: Indicator on actual control panel
    Master alarm with current output for control system
    Valve position feedback: isolated 4-20Ma, external 24V DC required
    Local control panel stop button with integrated indicator
    Digital Version Close signal: dry contacts
    Open signal: dry contacts
    Open indicator output: dry contacts
    Close indicator output: dry contacts
    Valve position feedback: isolated 4-20Ma, external 24V DC required
    Valve travel indication: both open and close indicator lights lit during travel
    Local/Remote control: integrated indicator light on actuator
    Local stop button: integrated indicator light on actuator Summary alarm output, dry contacts provided
    Valve Position Sensor Absolute position sensor, provides correct feedback even after power failure
    Resolution 4.85° - Maximum 13 turns
    Configuration & Set-Up USB connection to PC with Eltorque Manager v.3
    Configurable Parameters Valve type
    Open & Closed positions
    Speed, torque, valve position, valve seat region position
    Inverted I/O or fieldbus parameters depending on control interface
    Emergency & Safety
    Manual Operation Ergonomic hand wheel, mechanical valve-position indicator, status LED when actuator is powered
    Safety function disables motor if actuator is operated manually while powered
    Appx. Turns
    2 inch valve - 39
    3 inch valve - 49 4 inch valve - 59
    Shock MIL-STD-901D (Navy)
    Vibration MIL-STD-167-1A
    Electromagnetic Interference (EMI) MIL-STD-461F



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